﻿using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Text.RegularExpressions;
using System.Threading.Tasks;

namespace Common.Tool.DataTools
{
    public class ByteHelper
    {
        private static byte[] auchCRCHi = {0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81,
                                    0x40, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0,
                                    0x80, 0x41, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x00, 0xC1, 0x81, 0x40, 0x01,
                                    0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x01, 0xC0, 0x80, 0x41,
                                    0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x00, 0xC1, 0x81,
                                    0x40, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x01, 0xC0,
                                    0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x01,
                                    0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40,
                                    0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81,
                                    0x40, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0,
                                    0x80, 0x41, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x00, 0xC1, 0x81, 0x40, 0x01,
                                    0xC0, 0x80, 0x41, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41,
                                    0x00, 0xC1, 0x81, 0x40, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81,
                                    0x40, 0x01, 0xC0, 0x80, 0x41, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0,
                                    0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x01,
                                    0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41,
                                    0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81,
                                    0x40};
        private static byte[] auchCRCLo = {0x00, 0xC0, 0xC1, 0x01, 0xC3, 0x03, 0x02, 0xC2, 0xC6, 0x06, 0x07, 0xC7, 0x05, 0xC5, 0xC4,
                                    0x04, 0xCC, 0x0C, 0x0D, 0xCD, 0x0F, 0xCF, 0xCE, 0x0E, 0x0A, 0xCA, 0xCB, 0x0B, 0xC9, 0x09,
                                    0x08, 0xC8, 0xD8, 0x18, 0x19, 0xD9, 0x1B, 0xDB, 0xDA, 0x1A, 0x1E, 0xDE, 0xDF, 0x1F, 0xDD,
                                    0x1D, 0x1C, 0xDC, 0x14, 0xD4, 0xD5, 0x15, 0xD7, 0x17, 0x16, 0xD6, 0xD2, 0x12, 0x13, 0xD3,
                                    0x11, 0xD1, 0xD0, 0x10, 0xF0, 0x30, 0x31, 0xF1, 0x33, 0xF3, 0xF2, 0x32, 0x36, 0xF6, 0xF7,
                                    0x37, 0xF5, 0x35, 0x34, 0xF4, 0x3C, 0xFC, 0xFD, 0x3D, 0xFF, 0x3F, 0x3E, 0xFE, 0xFA, 0x3A,
                                    0x3B, 0xFB, 0x39, 0xF9, 0xF8, 0x38, 0x28, 0xE8, 0xE9, 0x29, 0xEB, 0x2B, 0x2A, 0xEA, 0xEE,
                                    0x2E, 0x2F, 0xEF, 0x2D, 0xED, 0xEC, 0x2C, 0xE4, 0x24, 0x25, 0xE5, 0x27, 0xE7, 0xE6, 0x26,
                                    0x22, 0xE2, 0xE3, 0x23, 0xE1, 0x21, 0x20, 0xE0, 0xA0, 0x60, 0x61, 0xA1, 0x63, 0xA3, 0xA2,
                                    0x62, 0x66, 0xA6, 0xA7, 0x67, 0xA5, 0x65, 0x64, 0xA4, 0x6C, 0xAC, 0xAD, 0x6D, 0xAF, 0x6F,
                                    0x6E, 0xAE, 0xAA, 0x6A, 0x6B, 0xAB, 0x69, 0xA9, 0xA8, 0x68, 0x78, 0xB8, 0xB9, 0x79, 0xBB,
                                    0x7B, 0x7A, 0xBA, 0xBE, 0x7E, 0x7F, 0xBF, 0x7D, 0xBD, 0xBC, 0x7C, 0xB4, 0x74, 0x75, 0xB5,
                                    0x77, 0xB7, 0xB6, 0x76, 0x72, 0xB2, 0xB3, 0x73, 0xB1, 0x71, 0x70, 0xB0, 0x50, 0x90, 0x91,
                                    0x51, 0x93, 0x53, 0x52, 0x92, 0x96, 0x56, 0x57, 0x97, 0x55, 0x95, 0x94, 0x54, 0x9C, 0x5C,
                                    0x5D, 0x9D, 0x5F, 0x9F, 0x9E, 0x5E, 0x5A, 0x9A, 0x9B, 0x5B, 0x99, 0x59, 0x58, 0x98, 0x88,
                                    0x48, 0x49, 0x89, 0x4B, 0x8B, 0x8A, 0x4A, 0x4E, 0x8E, 0x8F, 0x4F, 0x8D, 0x4D, 0x4C, 0x8C,
                                    0x44, 0x84, 0x85, 0x45, 0x87, 0x47, 0x46, 0x86, 0x82, 0x42, 0x43, 0x83, 0x41, 0x81, 0x80,
                                    0x40};
        public static byte[] Crc16(byte[] buffer, int DataLen, bool isHiLo = false)
        {
            byte uchCRCHi = 0xFF;         /* CRC 的高字节初始化 */
            byte uchCRCLo = 0xFF;         /* CRC 的低字节初始化 */
            byte uIndex = 0;              /* CRC 查询表索引 */
            ushort i = 0;                   /* buffer 数组下标 */
            while (true)                     /* 完成整个报文缓冲区 */
            {
                if (DataLen == 0)
                {
                    break;
                }
                else
                {
                    DataLen--;
                }
                uIndex = (byte)(uchCRCLo ^ buffer[i++]);
                uchCRCLo = (byte)(uchCRCHi ^ auchCRCHi[uIndex]);
                uchCRCHi = auchCRCLo[uIndex];
            }
            List<byte> data = new List<byte>() { };
            foreach (var item in buffer)
            {
                data.Add(item);
            }
            if (isHiLo)
            {
                data.Add(uchCRCHi);
                data.Add(uchCRCLo);
            }
            else
            {
                data.Add(uchCRCLo);
                data.Add(uchCRCHi);
            }
            return data.ToArray();
        }

        /// <summary>
        /// 验证CRC16校验码
        /// </summary>
        /// <param name="value">校验数据</param>
        /// <param name="poly">多项式码</param>
        /// <param name="crcInit">校验码初始值</param>
        /// <returns></returns>
        public static bool CheckCRC16(byte[] value, ushort poly = 0xA001, ushort crcInit = 0xFFFF)
        {
            if (value == null || !value.Any())
                throw new ArgumentException("生成CRC16的入参有误");

            var crc16 = GetCRC16(value, poly, crcInit);
            if (crc16[crc16.Length - 2] == crc16[crc16.Length - 1] && crc16[crc16.Length - 1] == 0)
                return true;
            return false;
        }

        /// <summary>
        /// 计算CRC16校验码
        /// </summary>
        /// <param name="value">校验数据</param>
        /// <param name="poly">多项式码</param>
        /// <param name="crcInit">校验码初始值</param>
        /// <returns></returns>
        public static byte[] GetCRC16(byte[] value, ushort poly = 0xA001, ushort crcInit = 0xFFFF)
        {
            if (value == null || !value.Any())
                throw new ArgumentException("生成CRC16的入参有误");

            //运算
            ushort crc = crcInit;
            for (int i = 0; i < value.Length; i++)
            {
                crc = (ushort)(crc ^ (value[i]));
                for (int j = 0; j < 8; j++)
                {
                    crc = (crc & 1) != 0 ? (ushort)((crc >> 1) ^ poly) : (ushort)(crc >> 1);
                }
            }
            byte hi = (byte)((crc & 0xFF00) >> 8);  //高位置
            byte lo = (byte)(crc & 0x00FF);         //低位置

            byte[] buffer = new byte[value.Length + 2];
            value.CopyTo(buffer, 0);
            buffer[buffer.Length - 1] = hi;
            buffer[buffer.Length - 2] = lo;
            return buffer;
        }
        /// <summary>
        /// 求和校验
        /// </summary>
        /// <param name="bytes"></param>
        /// <returns></returns>
        public static byte[] GetSumCcBytes(byte[] bytes)
        {
            try
            {
                byte sum = 0;
                foreach (var item in bytes)
                {
                    sum += item;
                }
                sum = Convert.ToByte(sum & 0xff);
                byte[] sumByte = new byte[] { sum };
                return bytes.Concat(sumByte).ToArray();
            }
            catch (Exception ex)
            {
                throw ex;
            }
        }

        public static bool GetHexString(string textstr, ref string hexStr)
        {
            string cleanStr = textstr;

            cleanStr = cleanStr.Replace(" ", "");

            // Remove commas
            cleanStr = cleanStr.Replace(",", "");

            // Remove carriage returns and newlines
            cleanStr = cleanStr.Replace("\r", "");
            cleanStr = cleanStr.Replace("\n", "");

            cleanStr = cleanStr.Replace("0x", "");
            cleanStr = cleanStr.Replace("0X", "");

            // Only parse text including valid hex characters
            // (stop at the first invalid character)

            Regex reg = new Regex(@"^[A-Fa-f0-9]+$");

            if (string.Empty != cleanStr)
            {
                if (reg.IsMatch(cleanStr) == false)
                {
                    return false;
                }
            }

            // Odd number of characters
            if (cleanStr.Length % 2 == 1)
            {
                // Insert a "0" before the last character to make a complete set of hex bytes (two characters each)
                //cleanStr = cleanStr.Insert(cleanStr.Length - 1, "0");
                return false;
            }
            hexStr = cleanStr;
            return true;
        }
        /// <summary>
        /// 字符串转16进制数组
        /// </summary>
        /// <param name="strings"></param>
        /// <returns></returns>
        public static byte[] StringToBytes(string strings)
        {
            try
            {
                byte[] buffer = null;
                string transstring = "";
                if (GetHexString(strings, ref transstring) == false)
                {
                    return buffer;
                }
                if (string.Empty != transstring)
                {
                    uint numBytesToWrite = Convert.ToUInt32((transstring.Length / 2).ToString());
                    buffer = new byte[numBytesToWrite];
                    // Convert each hex byte string to a BYTE value
                    for (int i = 0; i < numBytesToWrite; i++)
                    {
                        var hexByte = Convert.ToInt32(transstring.Substring(i * 2, 2), 16);
                        buffer[i] = Convert.ToByte(hexByte);
                    }
                    //return buffer;
                }
                return buffer;
            }
            catch (Exception ex)
            {
                throw ex;
            }

        }
        /// <summary>
        /// 16进制数组转字符串
        /// </summary>
        /// <param name="bytes"></param>
        /// <returns></returns>
        public static string BytesToString(byte[] bytes)
        {
            try
            {
                string str = "";
                if (bytes != null)
                {
                    foreach (var item in bytes)
                    {
                        str += item.ToString("X").PadLeft(2, '0') + " ";
                    }
                }
                return str.Trim();
            }
            catch (Exception ex)
            {
                throw ex;
            }
        }
        /// <summary>
        /// byte数组对比
        /// </summary>
        /// <param name="a"></param>
        /// <param name="b"></param>
        /// <returns></returns>
        public static bool EqualBytes(byte[] a, byte[] b, int exceptIndex = -1)
        {
            if (a.Length != b.Length)
            {
                return false;
            }
            bool result = true;
            for (int i = 0; i < a.Length; i++)
            {
                if (i == exceptIndex)
                {
                    continue;
                }
                if (a[i] != b[i])
                {
                    result = false;
                    break;
                }
            }
            return result;
        }

        /// <summary>
        /// byte数组对比
        /// </summary>
        /// <param name="a"></param>
        /// <param name="b"></param>
        /// <returns></returns>
        public static bool EqualBytes(byte[] a, byte[] b, int len, int exceptIndex = -1)
        {
            bool result = true;
            for (int i = 0; i < len; i++)
            {
                if (i == exceptIndex)
                {
                    continue;
                }
                if (a[i] != b[i])
                {
                    result = false;
                    break;
                }
            }
            return result;
        }
    }
}
